3QM Marine
Yanmar 3QM · 3QM family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
The Yanmar 3QM is a Yanmar marine diesel in the 3QM30 family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 3QM30 parts book and often sell cheaper through industrial/agricultural channels than under marine dealer pricing. — Yanmar OEM parts catalog in-repo (brands/yanmar/data/extracted/catalogs.csv)
=3QM30; cont rpm 2600 inferred from 2QM20 (DIN); hp/rpm verify
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
Parts by section · 33 assemblies
The exploded parts diagrams for the 3QM, grouped by system. Open a figure for its callout part numbers and per-variant quantities.
Camshaft & timing gears
Controls
Cooling – fresh water
Cooling – sea water
Crankshaft & flywheel
Cylinder block
Cylinder head & valves
Electrical & instruments
Fuel injection pump & governor
Fuel injectors & nozzles
Fuel lines, tank & filter
Gaskets, kits & spare parts
Generator (genset)
Intake and Exhaust
Lubricating
Pistons, rods & liners
Tools & labels
Transmission & drive
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- Category
- Marine
- Engine family
- 3QM
- Year range (approx)
- 1976–1984
- Cylinders
- 3
- Rated output
- 30 hp (22.1 kW)
- Bore × stroke
- 88 × 90 mm
- Displacement
- 1642 cc
- Max rpm
- 3000
- Continuous rpm
- 2600
- Aspiration
- Naturally aspirated